The film follows a man who thinks he saw his father in a documentary about a mysterious incident in Colorado, around which a conspiracy theory had been formed.
He embarks on the search of his father, who had fled Communist Hungary years ago.
[1][2][3] Eventually he finds his father, now a well-off university professor with a new family, but whose life is still affected by his previous work to decode the "message from space".
[5] While the majority of filming was in Hungary, His Master's Voice was also shot in various locations around Ottawa, Canada.
[6] The film has elements of mockumentary, featuring shots with outdated cameras and formats.